1) The brand-name version of a hair-loss has been found to be successfuly in 68% of patients. A new generic version is about to come to the market and researchers found it was succesful in a study of 400 participants, 250 had successful results. Is this enough to conclude the generic version has a lower success rate than the brand-name? Use a 1% level of significance. Question 2) The old model of a particular car got an average of =26 mpg. Design changes were made to improve fuel efficiency, and a test of 6 cars indicated an average of 29 mpg, with a standard deviation of 3 mpg. Does this indicate that the changes improved fuel efficiency? Use a 5 % level of significance. Question 3)A dental researcher timed seven people, in seconds, in how long they brushed their teeth in the morning and afternoon, without disclosing the times in between. Assume the distribution is normal. Is there any difference between the mean time spent brushing teeth in the morning and the afternoon? Use a 10% level of significance. AM 36 45 55 62 48 42 39 PM 32 41 50 62 40 45 39